High car, or hire car the Spanish returned (5)
I believe the answer is:
cable
'high car or hire' is the definition.
I can't tell whether this definition defines the answer.
'car the spanish returned' is the wordplay.
'car' becomes 'cab' (cab is a kind of car).
'the spanish' becomes 'el' ('the' in Spanish).
'returned' is a reversal indicator.
'el' in reverse letter order is 'le'.
'cab'+'le'='CABLE'
Can you help me to learn more?
(Other definitions for cable that I've seen before include "Telegram; wire rope" , "Strong thick rope made of twisted hemp or steel wire" , "Thick wire; telegram" , "Heavy chain or rope" , "Communications wire" .)